HEFT Repository

Clinical outcomes after upgrading from pacemakers to cardiac resynchronization therapy.

Leyva, Francisco and Zegard, Abbasin and Patel, Kiran and Panting, Jonathan and Marshall, Howard and Qiu, Tian (2018) Clinical outcomes after upgrading from pacemakers to cardiac resynchronization therapy. Pacing and clinical electrophysiology : PACE. ISSN 1540-8159. This article is available to all HEFT staff and students via ASK Discovery tool http://tinyurl.com/z795c8c by using their HEFT Athens login IDs

Full text not available from this repository.

Abstract

BACKGROUND AND AIMS

Right ventricular pacing may lead to heart failure (HF). Upgrades from pacemakers to cardiac resynchronization therapy (CRT) were excluded from most randomized, controlled trials. We sought to determine the long-term outcomes of upgrading from pacemakers to CRT with (CRT-D) or without (CRT-P) defibrillation in patients with no history of sustained ventricular arrhythmias.

METHODS AND RESULTS

In this observational study, clinical events were quantified in relation to the type of implant (de novo or upgrade) and device type at upgrade (CRT-P or CRT-D). Patients underwent CRT implantation (n = 1,545; 1,314 [85%] de novo implants and 231 [15%] upgrades) over a median of 4.6 years [interquartile range: 2.4 - 7.0]). In analyses of crude event rates, upgrades had a higher total mortality (adjusted hazard ratio [aHR]: 1.33; 95% confidence interval [CI] 0.10-1.61), a higher total mortality or HF hospitalization (aHR: 1.26; 95% CI 1.05-1.51), but similar mortality or hospitalization for major adverse cardiac events (MACEs, aHR: 1.15; 95% CI 0.96-1.38). No group differences emerged in any of these endpoints after propensity score matching. After inverse probability weighting in upgrades, total mortality (HR: 0.55; 95% CI 0.36-0.73), total mortality or HF hospitalization (HR: 0.56; 95% CI 0.34-0.79) and total mortality or hospitalization for MACEs (HR: 0.61; 95% CI 0.40-0.82) were lower after CRT-D than after CRT-P.

CONCLUSION

Upgrading from pacemakers to CRT was associated with a similar long-term risk of mortality and morbidity to de novo CRT. After upgrade, CRT-D was CRT-D was associated with lower mortality than CRT-P. This article is protected by copyright. All rights reserved.

Item Type: Article
Additional Information: This article is available to all HEFT staff and students via ASK Discovery tool http://tinyurl.com/z795c8c by using their HEFT Athens login IDs
Subjects: WG Cardiovascular system. Cardiology
Divisions: Emergency Services > Cardiology
Related URLs:
Depositing User: Miss Emily Johnson
Date Deposited: 26 Jan 2018 14:23
Last Modified: 26 Jan 2018 14:23
URI: http://www.repository.heartofengland.nhs.uk/id/eprint/1576

Actions (login required)

View Item View Item